Product design question

How would you build a product on Facebook for blood donation?

Practice this question out loud. An AI interviewer asks it, follows up like a real interviewer would, and scores your answer. Type or speak.

What this question tests

Product sense for a real, sensitive feature area, balancing urgency, trust, and logistics.

Identify the core problem, matching willing donors with urgent, nearby blood needs quickly, since blood has a short shelf life and type matching matters.
Identify the target users, people needing blood or posting on behalf of a patient, and potential donors nearby with the right blood type.
Propose the core mechanism, a donor request post that notifies nearby users with a matching blood type.
Address trust and spam, verification through blood banks or hospitals to prevent fraudulent requests.
Define success metrics, percentage of urgent requests matched with a donor within a target time window, for example 24 hours.

Names the real time sensitivity constraint of blood needs, distinct from a generic donation marketplace, and designs around fast, nearby matching.
Proposes a concrete trust mechanism, verification via partner blood banks or hospitals for urgent requests, to prevent abuse of a sensitive feature.
Sets a meaningful outcome metric, percent of requests matched within 24 hours, rather than just number of donor sign ups.

Designing this like a generic social post with no attention to blood type matching or urgency.
No fraud or verification mechanism for a feature that could be abused or misused.
No time bound success metric appropriate to how urgent blood needs actually are.

How would you prevent this feature from being used for scams or fraud?
How would you handle a request in an area with very few registered donors nearby?